Method for purifying carbon nanometre tube in large scale

Application Number: 00109207
Application Date: 2000.06.14
Publication Number: 1277146
Publication Date: 2000.12.20
Priority Information: 1999/6/15 KR 22420/1999; 2000/6/2 KR 30351/2000
International: C01B31/02
Applicant(s) Name: Lee Chul-Chim
Inventor(s) Name: Lee Chul-Chim;Ryu Chae-Evn
Patent Agency Code: 72002
Patent Agent: gan ling
Abstract A mass purification method of carbon nanotubes, capable of removing impurities sticking to carbon nanotubes. The purification method involves two wet purification steps and one dry purification step, which are performed in sequence. The first wet purification of crude carbon nanotubes is carried out with acid solution. In the second wet purification step, the carbon nanotubes from the first wet purification process are purified using an acetone and acid solution. The dry purification step uses a purification gas to purify the carbon nanotubes from the second wet purification step.